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Abdel-Hamid MS, Ismail S, Zaki MS, Abdel-Salam GMH, Otaify GA, Issa MY, Abdel-Kader M, Girgis M, Aboul-Ezz E, Mazen I, Aglan MS, Temtamy SA. GAPO syndrome in seven new patients: Identification of five novel ANTXR1 mutations including the first large intragenic deletion. Am J Med Genet A 2018; 179:237-242. [PMID: 30575274 DOI: 10.1002/ajmg.a.61021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/15/2018] [Accepted: 11/23/2018] [Indexed: 11/11/2022]
Abstract
GAPO syndrome is a very rare disorder characterized by growth retardation, alopecia, pseudoanodontia and progressive optic atrophy. It is caused by biallelic mutations in the ANTXR1 gene. Herein, we describe the clinical and molecular findings of seven new patients with GAPO syndrome. Our patients presented with the characteristic clinical features of the syndrome except for one patient who did not display total alopecia till the age of two years. Strikingly, optic atrophy and glaucoma were observed in all patients and one patient showed keratopathy in addition. Moreover, craniosynstosis was an unusual associated finding in one patient. Mutational analysis of ANTXR1 gene identified five novel homozygous mutations including two frameshift, two splice site and a large intragenic deletion of exon 3. Our results reinforce the clinical characteristics of the syndrome, expand the mutational spectrum and provide more insights into the role of the ANTXR1 protein in the regulation of extracellular matrix.
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Affiliation(s)
- Mohamed S Abdel-Hamid
- Medical Molecular Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Samira Ismail
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Maha S Zaki
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Ghada M H Abdel-Salam
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Ghada A Otaify
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Mahmoud Y Issa
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Mohamed Abdel-Kader
- Department of Dental Basic Science, Dental and Oral Research Division, National Research Centre, Cairo, Egypt
| | - Marian Girgis
- Pediatric Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Eman Aboul-Ezz
- Department of Dental Basic Science, Dental and Oral Research Division, National Research Centre, Cairo, Egypt
| | - Inas Mazen
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Mona S Aglan
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
| | - Samia A Temtamy
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt
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Benetti-Pinto CL, Ferreira V, Andrade L, Yela DA, De Mello MP. GAPO syndrome: a new syndromic cause of premature ovarian insufficiency. Climacteric 2016; 19:594-598. [DOI: 10.1080/13697137.2016.1200551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- C. L. Benetti-Pinto
- Department of Gynecology and Obstetrics, School of Medical Sciences, University of Campinas, Campinas, SP, Brazil
| | - V. Ferreira
- School of Medical Sciences, University of Campinas, Campinas, SP, Brazil
| | - L. Andrade
- Department of Pathology, School of Medical Sciences, University of Campinas, Campinas, SP, Brazil
| | - D. A. Yela
- Department of Gynecology and Obstetrics, School of Medical Sciences, University of Campinas, Campinas, SP, Brazil
| | - M. P. De Mello
- Center of Molecular Biology and Genetic Engineering, University of Campinas, Campinas, SP, Brazil
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Bayram Y, Pehlivan D, Karaca E, Gambin T, Jhangiani SN, Erdin S, Gonzaga-Jauregui C, Wiszniewski W, Muzny D, Elcioglu NH, Yildirim MS, Bozkurt B, Zamani AG, Boerwinkle E, Gibbs RA, Lupski JR. Whole exome sequencing identifies three novel mutations in ANTXR1 in families with GAPO syndrome. Am J Med Genet A 2014; 164A:2328-34. [PMID: 25045128 DOI: 10.1002/ajmg.a.36678] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Accepted: 06/11/2014] [Indexed: 11/05/2022]
Abstract
GAPO syndrome (OMIM#230740) is the acronym for growth retardation, alopecia, pseudoanodontia, and optic atrophy. About 35 cases have been reported, making it among one of the rarest recessive conditions. Distinctive craniofacial features including alopecia, rarefaction of eyebrows and eyelashes, frontal bossing, high forehead, mid-facial hypoplasia, hypertelorism, and thickened eyelids and lips make GAPO syndrome a clinically recognizable phenotype. While this genomic study was in progress mutations in ANTXR1 were reported to cause GAPO syndrome. In our study we performed whole exome sequencing (WES) for five affected individuals from three Turkish kindreds segregating the GAPO trait. Exome sequencing analysis identified three novel homozygous mutations including; one frame-shift (c.1220_1221insT; p.Ala408Cysfs*2), one splice site (c.411A>G; p.Gln137Gln), and one non-synonymous (c.1150G>A; p.Gly384Ser) mutation in the ANTXR1 gene. Our studies expand the allelic spectrum in this rare condition and potentially provide insight into the role of ANTXR1 in the regulation of the extracellular matrix.
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Affiliation(s)
- Yavuz Bayram
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
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Zeydan B, Benbir G, Uluduz D, Ince B, Goksan B, Islak C. Arterial and venous thrombosis of the cerebral vasculature in GAPO syndrome. Am J Med Genet A 2014; 164A:1284-8. [DOI: 10.1002/ajmg.a.36440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 12/26/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Burcu Zeydan
- Department of Neurology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
| | - Gulcin Benbir
- Department of Neurology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
| | - Derya Uluduz
- Department of Neurology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
| | - Birsen Ince
- Department of Neurology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
| | - Baki Goksan
- Department of Neurology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
| | - Civan Islak
- Department of Radiology; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
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